Comparison of Gainward GeForce GTX 1660 Pegasus video card vs ASUS ROG Strix GeForce GTX 1660 TI OC video card by specifications and benchmarks. Gainward GeForce GTX 1660 Pegasus runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 memory, while video card ASUS ROG Strix GeForce GTX 1660 TI OC runs at 1.500 GHz base clock speed and has 6 GB of GDDR6 memory. The TDP of the first video card is 120 W, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.